SOLUTION: A survey indicates that 40 percent of households in the USA have CD players. If a random sample of 250 households in the USA is drawn find the probability that the number of househ

Question 870659: A survey indicates that 40 percent of households in the USA have CD players. If a random sample of 250 households in the USA is drawn find the probability that the number of households that have players is :
A)exactly 95 B)at most 85 C) at least 95
Someone help me D:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi

p = .40,  n = 250

P(x = 95) = 250C95(.40)^95(.60)^155 =  binompdf(250,.40,95) = .0421  0r 4.21%

P(x ≤ 85) = binomcdf(250,.40,55) = .0297  0r 2.97%

P(x ≥ 95) = 1 - binomcdf(250,.40,94)= .7605 

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